bpa wrote:
> There have been user of LMS on FreeBSD system for a good while and
> transcoding is bound ot be used - yet I don't recall crash report.
>
> Could it be that the behaviour (i.e. don't shrink memory allocation from
> "high water" mark is normal for FreeBSD) is normal FreeBSD and that
> perhaps FreeBSD does shrink it back if resources get stretched. A bit
> like the 500 file handles issues just discussed.
>
> @Simonef
> Assuming this is not a LMS bug.
> What is the long term detrimental effect of large memory allocated to
> LMS - does system crash ?
> What problem could arise with large memory allocated to LMS - do other
> processes fail to start ?
The process will fill all the RAM and then crash. The "long-term"
depends on the transcoding. In extreme cases it can take 2 hours to fill
12GB and then crash.
philippe_44 wrote:
> I re-read the pipeline code and I can only think that BSD screws up
> either with the reader/writer/source socket by not releasing buffer when
> using localhost sockets or in that code
> >
Code:
--------------------
> >
> if ($writelen) {
>
> main::DEBUGLOG && $log->debug("Wrote $writelen bytes to
pipeline writer");
>
> if ($writelen != $pendingSize) {
> ${*$self}{'pipeline_pending_bytes'} =
substr($pendingBytes, $writelen);
> ${*$self}{'pipeline_pending_size'} =
$pendingSize - $writelen;
> }
> else {
> ${*$self}{'pipeline_pending_bytes'} = '';
> ${*$self}{'pipeline_pending_size'} = 0;
> }
> }
> else {
>
> ${*$self}{'pipeline_pending_bytes'} = $pendingBytes;
> ${*$self}{'pipeline_pending_size'} = $pendingSize;
>
> if ($! != EWOULDBLOCK) {
> return undef; # reflect error to caller
> }
>
> last;
> }
>
--------------------
> >
> The 'pipeline_pending_bytes' are not released either when being shrunk
> or re-assigned to the substr() of $pendingBytes. In any case,
> unfortunately, it looks like an obscure BSD+Perl issue that will be
> quasi-impossible to track w/o a full system and my FreeBSD VM is a
> real pain to use on VirtualBox as some of the drivers does not work
> well.
>
> [edit]: Have you looked more broadly at BSD and Perl and Memory Leak?
> For example, https://github.com/Perl/perl5/issues/17105 talks about an
> issue with syslog. I'm not a real FreeBSD user, I just do quick
> verification when some of my apps are compiled for it.
I'm gonna try the fix mentioned in the github issue you linked. If it
fail I'll setup a vm on my server and I'll send you credentials. (I'm
unable to send you MP, don't know why, do you have an e-mail addr?)
https://audiodigitale.eu
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